Calculations of fission rates for r-process nucleosynthesis
Abstract
Fission plays an important role in the r-process which is responsible not only for the yields of transuranium isotopes, but may have a strong influence on the formation of the majority of heavy nuclei due to fission recycling. We present calculations of beta-delayed and neutron-induced fission rates, taking into account different fission barriers predictions and mass formulae. It is shown that an increase of fission barriers results naturally in a reduction of fission rates, but that nevertheless fission leads to the termination of the r-process. Furthermore, it is discussed that the probability of triple fission could be high for and have an effect on the formation of the abundances of heavy nuclei. Fission after beta-delayed neutron emission is discussed as well as different aspects of the influence of fission upon r-process calculations.
Cite
@article{arxiv.astro-ph/0412654,
title = {Calculations of fission rates for r-process nucleosynthesis},
author = {I. V. Panov and E. Kolbe and B. Pfeiffer and T. Rauscher and K. -L. Kratz and F. -K. Thielemann},
journal= {arXiv preprint arXiv:astro-ph/0412654},
year = {2009}
}
Comments
28 pages, 10 figures, to be published in Nuclear Physics A